"Ktoś zamknął drzwi."

Translation: Someone has closed the door.

[mootlinger]

Is "Someone has shut the door" ok?

[Jellei]

Yes, it was working in the other sentence but somehow not in this one. Added here.

[va-diim]

"Has closed" is present perfect. This category is called Past Perfect, so it must be "had closed."

[immery]

the course is for teaching Polish not English, and the category is called wrong, it should be "perfective verbs in the past" or something like that.

That said "someone had closed the door" is a correct translation as well.

[Yola448704]

• czas teraźniejszy (present tense) -> Simple Present/ Present Continuous
  Ktoś (zawsze) zamyka drzwi - Someone closes the door
  Ktoś (obecnie) zamyka drzwi - Someone is closing the door

• czas przeszły (past tense) -> Present Perfect/ Simple past/ Past Perfect
  Ktoś zamknął drzwi - Someone has closed the door
  Ktoś (wczoraj) zamknął drzwi - Someone closed the door
  Mówili, że ktoś zamknął drzwi - They said someone had closed the door

[Walkinthedog]

Someone shut the door is used as often here.

[Jellei]

Works.

[Catnipkitten]

so someone finally heard of it

[Tim62192]

What about "Someone closed the door" - that is how I would say it ....

[Jellei]

Sure, that works.